The incident occurred in a pre-fight press conference ahead of his UFC bout with Nate Diaz on August 17, 2016 at the Copperfield Theatre in Vegas.

The presser became infamous when Diaz stormed out and the two began to throw bottles of water at each other.

At one point McGregor appears to grab a can of Monster energy drink from the table and hurls it towards his opponent.

But according to a lawsuit obtained by The Blast, security guard William Pegg is suing Notorious after claiming he was struck by the can.

He claims that he was hit in the back of the head, near his left shoulder.

And he says that he incurred medical expenses of around £3,800 after requiring treatment for his injuries.

Pegg is now chasing damages and believes he is entitled to at least £72,000.

In the lawsuit he states that McGregor collected £11m from his fight with Diaz, which saw him significantly struck by his opponent 166 times.

Pegg divided the £11m fee by 166 and arrived at the £68,000 with the extra £4k coming from medical expenses.

McGregors lawyers have filed a response to deny any responsibility.